Baby stroller frame



FIG. 1 is a front isometric view of a baby stroller frame, showing ournew design;

FIG. 2 is a rear elevational view thereof; and,

FIG. 3 is a bottom plan view thereof.

The phantom lines shown in FIGS. 1 through 3 are for illustrativepurposes only and form no part of the claimed design.

The ornamental design for a baby stroller frame, as shown and described.